I doubt the government will want to keep fighting bitcoin. What they will try to do is bring it under their control which would be almost impossible. Hence, right now all they are doing is pulling out policies and imposing absurd laws so they can at least indirectly control the whole network. The government cant help but accept crypto currencies eventually. Fighting it would only leave them behind on the field of financial tech development. The future is fiat and bitcoin/cryptocurrencies being used together. About the taxes part, even if bitcoin goes mainstream, you will still need to pay taxes. There is no escaping that.
The government can not be predicted sometimes and that is why we don't know the show they will come up with later maybe they will tell people that investing in Bitcoin is not safe and that the highest they can do is to talk but Bitcoin is not something they can stop its operation and if trump should even win the election they there will be more positive news and it will reflect on the price of bitcoin and the government is always trying to control everything they want to be in charge of everything. the only way they will want to frustrate Bitcoin users with their policies is to look at countries where they are taxing almost 30% of every transaction for something they did not work for the government likes exploiting people I want to know their contribution when they are collecting something huge from the people, and because of the tax, they are making they are not bothered about the feeling of the people so they won't be saying much about bitcoin.